Abstract: A system and a method to determine a compensated speed of sound (SoS) for a gas is disclosed. The system comprises a first sensor configured to determine a current temperature of the gas flowing within a gas channel; a second sensor configured to emit signals within the gas to determine a gas flow rate; and at least one processor configured to determine an absolute time of flight (aToF) of the signals in an upstream direction and a downstream direction; a delta time of flight (dToF) of the signals based on the aToF in the upstream direction and downstream direction; a gas flow rate based on the aToF and the dToF; a SoS within the gas based on the aToF; and the compensated SoS for the gas based at least on the determined SoS, a base condition, the determined gas flow rate, and the determined current temperature of the gas.

Abstract: The present invention provides a method for protecting living plants from harmful insects by using a sheetlike structure impregnated with an insecticide to cover the surface of the trunk, pseudotrunk, branch, root ball and/or root region of the plant. Additionally provided are living plants whose trunk, pseudotrunk, branch, root ball and/or root region surface is covered with a sheetlike structure impregnated with an insecticide. The invention also relates to a rectangular sheetlike structure impregnated with an insecticide and comprising a fastening means which, following tubular coverage of the surface of trunk, pseudotrunk or branch of a plant, allows a permanent hold thereto. It further relates to a sheetlike structure impregnated with an insecticide, in the form of a perforated sheet which has a continuous interruption between the outer and inner edges. Lastly, it also relates to the use of the sheetlike structure for protecting living plants from harmful insects.

Abstract: In a process for protection of a gas turbine (1) from damage caused by pressure pulsations (P), pressure pulsations (P) occurring during the operation of the gas turbine (1) are measured, from the measured pressure pulsations (P), a pulsation-time signal (PZS) is generated, the pulsation-time signal (PZS) is transformed into a pulsation-frequency signal (PFS), from the pulsation-frequency signal (PFS), a pulsation level (PL) is determined for at least one specified monitoring frequency band (12), the pulsation level (PL) is monitored for the occurrence of at least one specified trigger condition, and, when the at least one trigger condition occurs, a specified protective action (16) is carried out.

Abstract: A method of protecting log dumps from attack by harmful organisms during storage, where the log dumps are largely covered with a sheet-like material (M), where this sheet-like material (M) has, as the result of impregnation with an insecticidal active ingredient, a protective activity against harmful organisms, which method can be employed in a simple fashion over large areas, in remote locations.

Abstract: In a process for protection of a gas turbine (1) from damage caused by pressure pulsations (P), pressure pulsations (P) occurring during the operation of the gas turbine (1) are measured, from the measured pressure pulsations (P), a pulsation-time signal (PZS) is generated, the pulsation-time signal (PZS) is transformed into a pulsation-frequency signal (PFS), from the pulsation-frequency signal (PFS), a pulsation level (PL) is determined for at least one specified monitoring frequency band (12), the pulsation level (PL) is monitored for the occurrence of at least one specified trigger condition, and, when the at least one trigger condition occurs, a specified protective action (16) is carried out.